'Roundhead' definitions:
Definition of 'roundhead'
From: WordNet
noun
A brachycephalic person
noun
A supporter of parliament and Oliver Cromwell during the English Civil War
Definition of 'Roundhead'
From: GCIDE
- Roundhead \Round"head`\, n. (Eng. Hist.) A nickname for a Puritan. See Roundheads, the, in the Dictionary of Noted Names in Fiction. --Toone. [1913 Webster]